Short answer: Not easily until Debian Buster is out. It can be done but needs packagers willpower.
See
I worked on the package https://github.com/YunoHost-Apps/prettynoemiecms_ynh which also needs a php version that is not available in Debian Strech. It takes a lot of time and energy to find ways to use the new php version. I gave up, not enough time for that and it’s rather complex